Calipers



July 31, 1934-' B. B. WITTFOHT 1,968,331l

CALIPERS Filed Nov. 2. 1931 2 Sheets-Sheet 1 Inventor llorney July 31,

B. B. WlT'l-FOHT CALIPERS Filed Nov. E'l 1951 2 Sheets sheet 2 Inventor w 1 Bu M Jqlloffley Patented July 31, 1934 narran STATES :ArtNr or rea4 . kCALIPERS Byron Barten Wittfoht, Bartonviue, nl. .Application November 2, 1931, Serial No. 572,662

3 Claims. (Cl. A33-118) This invention `relates to calipers, and particularly to a new and 4novel caliper which I call an indicating transfer calipers, which is'particularly adapted to the requirements of a-pattern maker and foundry inspector, in taking oil and transferring 'thicknesses and other measure ments of castings and the like. i

It is an object of this inventionv to provide an efiicient device of the character described at a lower cost than it has heretofore `been possible to provide a device for thickness gauging and transfer work, and other types of this class of work.

It is also an object of this invention to provide Ia-n easily manipulated device of the character described, which has an unusual opening or spread, in contrast to the known types of calipers used for the mentioned work, which, because of their gear and sector movement and the like movements are not only expensive but very limited by comparison in capability of opening.

' It is also an object of the invention to provide calipers of the type described which may also lbe spread beyond the reading limits of its scale '25- so as to admit of passing it around an obstacle or around an enlargement such as a flange on the object to be measured, and which will close after passage around the obstacle so that the indicator will come to rest at the proper place, upon the scale.

'I'hese and other objects of the invention, its nature, and its composition and arrangement and combination of parts will be readily understood by anyone acquainted with the art to which this invention relates upon consulting the following description of the drawings in which:

Figure 1 is a general side elevational view of the calipers of my invention showing it in use in connection with a flanged object.

Figure 2 is an enlarged edge view of the upper part of the device of the invention taken from the left in Figure 1.

Figure 3 is a horizontal sectional view looking downwardly taken approximately on the line 3 3 of Figure 1.

Figure 4 is an enlarged side elevational view of part of the upper portion of the caliper structure of my invention.

Referring in detail to the drawings the numeral 5 designates one of the levers or arm or leg strucobject to'be measured, such as a car wheel or the like such as is indicated generally at 8.v The upper portionof the lever or arm'5 is extended intola semi-circular form as at 9, providing the downwardly directed portion 10. Approximately 59 centrally of the semi-circular portion 9 there extends upwardlyand to onev side a handlefo-rmation 11. `Urider and to one side of the handle formation 11 a bore or hole 12 is formed to receive the'pivot '13, which pivotally connects the arms 5 and 6 together in overlapping relation as seen in Figure 1. The arm 6 is similar in conguration to the arm 5 except that the corresponding upper semi-arcuate form 14 thereof does not have a portion similar to that formed on the m arm 5 and indicated at 10, and the form 14 is more properly described as a segment of about a quarter of a circle.

A further unlikeness of the arm 6 compared Y with the arm 5 is brought about by the provi- 75 sion on the arm 6 of a generally segmental formation 15 placed with the vertex or center thereof approximately at the meeting of the straight portion of the arm 6 and the arcuate portion 14. The upper curved portion of the segmental member 15 is provided with indicia as indicated at 16 suitably arranged and graduated.

Formed in the vertex or center of the segmental member 15 and in the arm 6 is an elongated arcuate slot 17 having the same radius of curvature as the upper portion of the segmental member 15. Below the slot 17 a pivot member 18 is extended through the arm, and it mounts by its lower end an indicator pointer 19, which may be set as desired.

From the back of the indicator pointer 19 extends a pin 20 through the arcuate slot 17. On the opposite side of the arm 6 from the pointer 19 and below the position of the pivot 18 is a bracket 21 which anchors a vertical steel spring 22 whose upper portion engages one side of the pin 20 as shown in dotted lines in Figure 1 whereby to normally 'force the pin 20, which engages the arcuate portion 10 whereby to move the leg or arm 5, away from the leg 6, and carry the pointer 19 toward the right and away from zero of the scale 16.

It is believed to be obvious that the construction described above provides that upon spreading the legs of the device for passing around an obstacle, the legs may be returned to the correct reading of the device without further setting or comparisons, so that recalculation or rescaling is rendered unnecessary, and the measurements may be taken 01T and transferred without the mentioned additional operations.

It is believed that the above description is sufficient to enable anyone acquainted with the art to which this invention relates to understand, make and use the invention. However, it is to be definitely understood that I do not desire to limit the application of this invention to the particular modification set out herein to illustrate the principles thereof, and any change or changes may be made in materials and in the structure and arrangement of parts, within the spirit and scope of the invention.

Having thus described my invention, whatI.

claim as new is:

1. A calipers comprising a pair of. crossed and pivoted arms, one of said arms carrying ascale, a pivotally mounted pointer for said scale, anda spring engaging a portion of said pointer eccentric of its pivotal mounting for urging said pointer in one direction; said portion comprising a projection on the pointer extending from the inner side ofthe pointer and through an opening provided in the said one arm, the remaining arm having a portion slidably engageable with -said projection on the pointer for swinging the pointer when the arms are brought toward closed position and subtend-an arc less than their possible opening.

2. A calipers comprising a pair of crossed and pivoted arms, one of said arms carrying a scale, a pivotally mounted pointer for said scale, and a spring engaging a portion of said pointer eccentric of its pivotal mounting for urging the pointer in one direction; said portion comprising a projection on the pointer extending from the inner side of the pointer and through an opening provided in the said one arm, the remaining arm having a portion slidably engageable with said projecti-on on the pointer for swinging the pointer when the arms are brought toward closed position and subtend an arc less than their possible opening, the last-mentioned portion being curved.

3. A calipers comprising a pair of crossed and Vpivotedrarms, one of said arms carrying a scale,

a pivotally mounted pointer for said scale, and a spring engaging a portion of said pointer eccentric of its pivotal mounting for urging said pointer in one direction; said portion comprising a projection on thepointerA extending from the innerfside' of the pointer, andthrough angopening. providedl in the said one arm, the remaining arm:

pointer only when the arms -are brought toward closed position andsuiotend an are less than their possible openning'.

- BYRONn BART-ELL WI'ITFOHT. 

